3 9) Use y'(3) to determine if the graph of y = 4 cos x +- is increasing or decreasing when x = 3. %3D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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**Problem 9:**

Use \( y'(3) \) to determine if the graph of \( y = 4 \cos x + \frac{3}{x} \) is increasing or decreasing when \( x = 3 \).

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**Explanation:**

To determine if the function is increasing or decreasing at \( x = 3 \), you need to calculate the derivative \( y'(x) \) and evaluate it at \( x = 3 \). If \( y'(3) > 0 \), the function is increasing at \( x = 3 \); if \( y'(3) < 0 \), the function is decreasing at \( x = 3 \).
Transcribed Image Text:**Problem 9:** Use \( y'(3) \) to determine if the graph of \( y = 4 \cos x + \frac{3}{x} \) is increasing or decreasing when \( x = 3 \). --- **Explanation:** To determine if the function is increasing or decreasing at \( x = 3 \), you need to calculate the derivative \( y'(x) \) and evaluate it at \( x = 3 \). If \( y'(3) > 0 \), the function is increasing at \( x = 3 \); if \( y'(3) < 0 \), the function is decreasing at \( x = 3 \).
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